Improvement in sand-papering machines



JOSEPH BARKER. Improvement in Sand Paperng IJachines.` N0. 115,414. v Y Patented May 30,1871.

mmmmmw Y i 4pertaining thereto..

PrrrnrrrA QFFIOE.

JOSEPH BARKER, OF OHIOAGO, ILLINOIs.

|MPRcvEMEN'r iN sANp-PAPERING MACHINES.

y, speication forming part of Letters Patent N0.`115,414, dated May 30,1`e71.

` To all 'whomths may'concewi:

Be it known that L'Josnrn BARKER, of

a .,hiCJgO, in the county of Cook and VState of Illinois, have inventeda new and Improved,

Sand-Papering Machine; and I do hereby declare that the following isa full, clear,.and

f exact description thereof, which will enable l i `others skilled in theart to make and tuse the f `same, reference being had to the accompanyj ing drawing and'letters marked thereon, in

whichj v y `Figure 1 is aplan view of my improved Sand-papering machine Fig. 2, a longitudinal *section thereof; Fig. 3,`an end elevation.; and

Figs. 4, 5, 6, and 7 are parts "and sections ap- 'lhe present invention relates to anew and improved machine for sand-papering flat surfaces; vand its vnature consists, rst, in a sandpapering wheelwhioh has an open center, and

1 "is provided with a series ,of blocks for holding fthepaper, so arranged that tangent furrows j are formed between them; secondly, the object of making the center open, or partly so,

f f is to prevent that part of the wheel or sand-` paper thereon from coming in contact with the ysurface to be smoothed, as is the case with the ordinary sand-papering disks now in use,

' assuch disks do not i cut but little, .if any, in their central parts, and consequently clog up with dust, which prevents the surface of the disk near the peripheryfrom coming in conlf I tact with the surface tobe smoothed', thirdly, the object of putting the blocks in the wheel in sections isfor convenience of adjusting and removing the sand-paper, and for forming a seriesof tangent furrows, to allow a current O 1 of air to pass `from the center of the wheel to the periphery and carry the dust out with it; fourthly, the nature further`^ consists in such inechanism as isnecessary to operate the said wheel and'` carry the stuff to be smoothed under it, whether it be thick or thin.

D d represent a substantial bed or frame-Y work, which supportsthe mechanism of the h machine, said frame being made of wood or iron, as most convenient. "To the frame D d are attached two standards, A, for supporting the cross-beams B 0,-which" hold the vertical shaft F of the sand-papering wheel K in proper position. z This wheel K consists of `a center, M, made partially open by means of vertical holes P, of a series of tangent arms, g g, 8vo., and a rim. The lower parts of thetanas is also the inside of the lower part of the form a suitable support for the sand-papering to t the openings between the Varms g, center M, and rim Ic, and to pass a little below them, as shown at Fig. 2. IThe wheel K is then roder sides of the blocks are turned so that their lower faces shall conform to a parallelogram; but they yet project below the wheel, (proper,) leaving a recessed center, as clearly shown. AThe sand-paper is then placed on the blocks N, and clamped down rmly on the lianges m n by means of bars or levers L, the inner ends of which are fastened to the rim of center M and the outer ends to the rim k by means of set-screws I I, 8vo., the central parts of the bars bearing on the central parts of the blocks.

blocks N, can be readily removed by loosencontact with the paper on the adjoining block -leaves furrows for thedust to pass out, causingthe sand-paper to wear muchlonger than when the dust is allowed to grind into it, or when no furrows are made, or whenl the wheel is covered with a continuous piece of paper, as is customary at the present time. The means for carrying the stuff to be finished under the wheel K consist of upper rollers J and lower rollers It, the feeding being done by hand; but it may be done by power, when desired. The lower rollers It have bearings in blocks S, which, at their lower ends, are pivoted to a table, B, and at their other ends y bear on a yielding substance, as shown in Figs. 2 and 7, the rubber being shown at vt. By this means stuff not having a uniform thick- `ness can be put through the machine.

Inorder'that different thicknesses of stuff, doors, blinds, shutters, Ste., maybe put through the machine and brought properly to the sandpaper f, a sliding table, B', is arranged to bear turned they will operate a screw, c, Fig. 2, and draw on a rod, X, which will move the table the incline a b, as the case may require. The

gent arms are provided with beveled flanges,

rim, as shown at m fn, Figs. 5 and 6, so as to blocks N. The said blocks are so formed `as tatedA in a lathe or otherwise, while the un- The sand-paper, not being fastened to the A ing the setscrews I, and its not coming in` oninclines a b, so that when wheels T are.

endwise, and consequently raise or lower it on turning of either Wheel T Will perform the above-described function, two Wheels being used simply for convenience of the operator. A hopper, E, at the bottom of machine, is

V used to convey dust to a convenient place out of the Way.

Having thus fully described the construction and operation of my invention, what I claim, and desire to secure by Letters Patent, is-

1. The Wheel K, formed with a recess or depression in the central part of its under side, to obviate a dead-point in said wheel When it is used for finishing at surfaces, as described. 

